Add customer communication system

LittleShop/DTOs/CustomerMessageDto.cs

@@ -0,0 +1,118 @@
+using System.ComponentModel.DataAnnotations;
+using LittleShop.Models;
+
+namespace LittleShop.DTOs;
+
+public class CustomerMessageDto
+{
+    public Guid Id { get; set; }
+    public Guid CustomerId { get; set; }
+    public Guid? OrderId { get; set; }
+    public Guid? AdminUserId { get; set; }
+    public MessageDirection Direction { get; set; }
+    public MessageType Type { get; set; }
+    public string Subject { get; set; } = string.Empty;
+    public string Content { get; set; } = string.Empty;
+    public MessageStatus Status { get; set; }
+    public DateTime CreatedAt { get; set; }
+    public DateTime? SentAt { get; set; }
+    public DateTime? DeliveredAt { get; set; }
+    public DateTime? ReadAt { get; set; }
+    public DateTime? FailedAt { get; set; }
+    public string? FailureReason { get; set; }
+    public int RetryCount { get; set; }
+    public DateTime? NextRetryAt { get; set; }
+    public Guid? ParentMessageId { get; set; }
+    public Guid? ThreadId { get; set; }
+    public string Platform { get; set; } = string.Empty;
+    public string? PlatformMessageId { get; set; }
+    public int Priority { get; set; }
+    public DateTime? ScheduledFor { get; set; }
+    public DateTime? ExpiresAt { get; set; }
+    public bool RequiresResponse { get; set; }
+    public bool IsUrgent { get; set; }
+    public bool IsMarketing { get; set; }
+    public bool IsAutoGenerated { get; set; }
+    public string? AutoGenerationTrigger { get; set; }
+    
+    // Navigation properties
+    public CustomerSummaryDto? Customer { get; set; }
+    public string? AdminUsername { get; set; }
+    public string? OrderReference { get; set; }
+    
+    // For message delivery
+    public long TelegramUserId { get; set; }
+    
+    // Helper properties
+    public string DisplayTitle { get; set; } = string.Empty;
+    public string StatusDisplay { get; set; } = string.Empty;
+    public string DirectionDisplay { get; set; } = string.Empty;
+    public string TypeDisplay { get; set; } = string.Empty;
+}
+
+public class CreateCustomerMessageDto
+{
+    [Required]
+    public Guid CustomerId { get; set; }
+    
+    public Guid? OrderId { get; set; }
+    
+    public Guid? AdminUserId { get; set; } // Set by controller from claims
+    
+    [Required]
+    public MessageType Type { get; set; }
+    
+    [Required]
+    [StringLength(100)]
+    public string Subject { get; set; } = string.Empty;
+    
+    [Required]
+    [StringLength(4000)]
+    public string Content { get; set; } = string.Empty;
+    
+    public int Priority { get; set; } = 5;
+    
+    public DateTime? ScheduledFor { get; set; }
+    
+    public DateTime? ExpiresAt { get; set; }
+    
+    public bool RequiresResponse { get; set; } = false;
+    
+    public bool IsUrgent { get; set; } = false;
+    
+    public bool IsMarketing { get; set; } = false;
+}
+
+public class CustomerMessageSummaryDto
+{
+    public Guid Id { get; set; }
+    public Guid CustomerId { get; set; }
+    public string CustomerName { get; set; } = string.Empty;
+    public Guid? OrderId { get; set; }
+    public string? OrderReference { get; set; }
+    public MessageDirection Direction { get; set; }
+    public MessageType Type { get; set; }
+    public string Subject { get; set; } = string.Empty;
+    public MessageStatus Status { get; set; }
+    public DateTime CreatedAt { get; set; }
+    public DateTime? SentAt { get; set; }
+    public bool IsUrgent { get; set; }
+    public bool RequiresResponse { get; set; }
+    public string DisplayTitle { get; set; } = string.Empty;
+}
+
+public class MessageThreadDto
+{
+    public Guid ThreadId { get; set; }
+    public string Subject { get; set; } = string.Empty;
+    public Guid CustomerId { get; set; }
+    public string CustomerName { get; set; } = string.Empty;
+    public Guid? OrderId { get; set; }
+    public string? OrderReference { get; set; }
+    public DateTime StartedAt { get; set; }
+    public DateTime LastMessageAt { get; set; }
+    public int MessageCount { get; set; }
+    public bool HasUnreadMessages { get; set; }
+    public bool RequiresResponse { get; set; }
+    public List<CustomerMessageDto> Messages { get; set; } = new();
+}